CDT-36 4" x 60 yard Dark Blue Duct Tape (Case) A 10.2 mil. 38 mesh. High quality general purpose polyethylene-coated cloth with a natural rubber based adhesive. Tape will conform well to irregular surfaces, and will not twist or curl during application. Excellent water and abrasion resistance. Tape is hand-tearable (tears evenly across web). Used as a quality waterproof packaging tape for export shipments; for splicing, vinyl repair, protecting, bundling, and color coding; for ductwork sealing and seaming.